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Hüseyin Akbulut, MSc (2026). Modified Balke Protocol — Protocol, Norms and Application. Sporeus. Retrieved, July 9, 2026. https://sporeus.com/en/egzersiz-testleri-en/modified-balke-protocol/
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Measures: Fonksiyonel egzersiz kapasitesi, VO₂ maks tahmini (düşük kondisyonlu popülasyon)
Table of Contents
Difficulty: Easy | Category: Aerobic
Protocol
The Modified Balke Protocol is an adapted version of the standard Balke protocol with a lower starting speed and slower grade increase. It was developed specifically for sedentary, elderly, or cardiac patient populations. Preparation: The treadmill is set to 3.2 km/h (women) or 4.0 km/h (men). The participant warms up for 3–5 minutes at the same speed with 0% grade. Symptoms and vital signs are recorded. Protocol: The test starts at 0% grade. Grade increases by 2% during the first 5 minutes (0.4% per minute). Thereafter, grade increases by 1% every 2 minutes. Speed remains constant. This slow progression allows individuals with low fitness to sustain the test longer and provide more reliable data. Termination Criteria: Standard symptom-based criteria apply (chest pain, dyspnea, abnormal ECG changes, severe hypertensive response). Calculation: Standard Balke formulas are applied or MET value is calculated. Using 1 MET = 3.5 ml/kg/min, VO₂max is estimated from the MET value of the last completed stage. Post-Test: Grade is gradually reduced to zero and the participant walks at low speed for 3–5 minutes. Vital signs are re-measured at 3 and 5 minutes post-test. When used as a cardiac stress test, ECG anomalies are interpreted by the clinician.Formula
VO₂max ≈ MET_final_stage × 3.5 ml/kg/min; MET değeri eğim ve hız tablosundan hesaplanır
Equipment Required
koşu bandı, kalp atım hızı monitörü, kan basıncı manşeti
Normative Values (Age: 50-69)
| Classification | Male | Female |
|---|---|---|
| Excellent | >7 MET | >6 MET |
| Good | 5-7 MET | 4-6 MET |
| Average | 3-5 MET | 2.5-4 MET |
| Below Average | 2-3 MET | 1.5-2.5 MET |
| Poor | <2 MET | <1.5 MET |
Practical Applications
Modified Balke is the preferred protocol in cardiac rehabilitation programs, for physiotherapists working with elderly individuals, and for assessing sedentary individuals with low fitness.Limitations
Ceiling effects may occur in highly fit individuals. The constant speed may not provide biomechanical comfort for all participants.Related Tests: Balke Protocol, Naughton Protocol, Bruce Protocol
Sources: ACSM Guidelines for Exercise Testing, 2021; Franklin BA, 2000, Chest
References
- Balke B, Ware RW. (1959). An experimental study of physical fitness of Air Force personnel. United States Armed Forces Medical Journal, 10(6): 675-688.
- Pollock ML, Bohannon RL, Cooper KH, Ayres JJ, Ward A, White SR, Linnerud AC. (1976). A comparative analysis of four protocols for maximal treadmill stress testing. American Heart Journal, 92(1): 39-46. doi:10.1016/S0002-8703(76)80401-2
- American College of Sports Medicine. (2021). ACSM’s Guidelines for Exercise Testing and Prescription (11th ed.). Philadelphia: Wolters Kluwer.
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Key Facts
Protocol The Modified Balke Protocol is an adapted version of the standard Balke protocol with a lower starting speed and slower grade increase. It was developed specifically for sedentary, elderly, or cardiac patient populations. Preparation: The treadmill is set to 3.2 km/h (women) or 4.0 km/h (men). The participant warms up for 3–5 minutes at the same speed with 0% grade. Symptoms and vital signs are recorded. Protocol: The test starts at 0% grade. Grade increases by 2% during the first 5 minutes (0.4% per minute). Thereafter, grade increases by 1% every 2 minutes. Speed remains constant. This slow progression allows individuals with low fitness to sustain the test longer and provide more reliable data. Termination Criteria: Standard symptom-based criteria apply (chest pain, dyspnea, abnormal ECG changes, severe hypertensive response). Calculation: Standard Balke formulas are applied or MET value is calculated. Using 1 MET = 3.5 ml/kg/min, VO₂max is estimated from the MET value of the last completed stage. Post-Test: Grade is gradually reduced to zero and the participant walks at low speed for 3–5 minutes. Vital signs are re-measured at 3 and 5 minutes post-test. When used as a cardiac stress test, ECG anomalies are interpreted by the clinician. Formula
VO₂max ≈ MET_final_stage × 3.5 ml/kg/min; MET değeri eğim ve hız tablosundan hesaplanır
Equipment Required
koşu bandı, kalp atım hızı monitörü, kan basıncı manşeti
